Spinal nerve tracer

ABSTRACT

Display apparatus for instructional and demonstrative purposes and for use by practitioners in the healing arts. The apparatus employs a simulated, erect human spine having a series of vertebrae, each rotatable to the left or right or shiftable out of proper lateral alignment to simulate a misalignment condition. Pictorial illustrations of the left and right sides of the human anatomy in frontal views flank the spine on opposite sides thereof, and have transparent zones at selected terminal nerve endings of the spinal nerves. Electric lamps are disposed behind the illustrations adjacent the respective zones. As a particular vertebra is rotated or shifted out of proper alignment, the appropriate lamp or group thereof are energized to illuminate the corresponding zone or zones to thereby visually indicate the organ, muscle, bone or tissue structure affected by interference with the spinal nerve emanating from the displaced vertebra. In this manner, nerve impulses are traced from the emission of particular spinal nerve at the intervertebral foramen level to the affected nerve endings.

[ 1 May 8, 1973 United States Patent [191 Pile et al.

[57] ABSTRACT Display apparatus for instructional and demonstrativeSPINAL NERVE TRACER Inventors: Donald L. Pile,

Charles E. Grandell,

purposes and for use by practitioners in the healing arts. The apparatusemploys a simulated, erect human Arthur H. Flye, Henry R.Scheuermann,Sr., all of Topeka, Kans.

spine having a series of vertebrae, each rotatable to the left or rightor shiftable out of proper lateral align- [73] Assignee: said Pile, bysaid Grandell, Flye, and

Scheuermann 22 Filed: Jan. 24, 1972 21 Appl.No.: 220,262

and have transparentzones at selected terminal nerve endings of thespinal nerves. Electric lamps are disposed behind the illustrationsadjacent [52] Us Cl G09, g f the respective zones. As a particularvertebra lS rotated or shifted out of proper alignment, the appropriatelamp or group thereof are energized to illu- [51] Int. [58] Field ofSearch..........................................35/l7 minate thecorresponding zone or zones to thereby [56] References Cited visuallyindicate the organ, muscle, bone or tissue UNITED STATES PATENTSstructure affected by interference with the spinal nerve emanating fromthe displaced vertebra. In this 1,343,141 6/1920Kenagy.....................................35/l7 manner, nerve impulsesare traced from the emissionHassler.....................................35/l7 of particular pinalnerve at the intervertebral fox-amen 2,537,573 1/1951Conschafter.............................35/l7 level to the affectednerve endings.

Primary Examiner-Harland S. Skogquist Attorney-D. A. N. Chase 10 Claims,8 Drawing Figures SPINAL NERVE TRACER This invention relates toinstructional and demonstrative apparatus for use 'by practitioners inthe healing arts and, in particular, to display apparatus for tracingnerve impulses from the emissions of the spinal nerves at theintervertebral foramen level to the terminal nerve endings thereof.

In the human nervous system, nerve impulses from the brain are conductedby the spinal cord to the various pairs of branching spinal nerves thatemanate from the intervertebral foramina. If a vertebra is displaced toa position out of proper alignment with the other vertebrae of thespinal column, interference with the associated spinal nerve may resultand be felt as an impairment of the particular organ, muscle, bone ortissue structure at the terminal nerve endings of the affected spinalnerve. Although practitioners in the healing arts are aware of thecircuitry of the nervous system from the intervertebral foramen level tothe nerve endings, no means is presently available to demonstrate thenerve tracing in a manner readily understandable to the student, theexperienced practitioner, or a patient with a displaced vertebralcondition to whom an explanation of the cause of his apparent afflictionin other parts of his body must be made with full understanding.

It is, therefore, the primary object of the present invention to providean instructional display apparatus for tracing nerve impulses from theemission of a particular spinal nerve at the intervertebral foramenlevel to the affected nerve endings.

As a corollary to the foregoing object, it is an important aim of thisinvention to provide apparatus as aforesaid which visually indicates ona pictorial representation of human anatomy the nerve ending or endingsaffected by interference with a spinal nerve emanating from a rotated orlaterally displaced vertebra.

A further and important object of the invention is to provide such anapparatus in which a simulated human spine is employed that may bemanipulated by the attending practitioner or instructor in order thatthe viewer may see the direct result of the vertebral displacement asindicated on the anatomical representation.

Still another important object of the invention is to provide apparatusas aforesaid in which the pictorial representation of human anatomycontains transparent zones at selected nerve endings, behind whichelectric lamps are disposed and are energized to illuminate thecorresponding zones in accordance with the particular nerve interferenceto vividly indicate to the viewer the organ, muscle, bone or tissuestructure affected by the interference.

In the drawings:

FIG. 1 is a front view of the apparatus of the present invention;

FIG. 2 is a plan view of the apparatus on a reduced scale;

FIG. 3 is an enlarged, fragmentary, horizontal sectional view throughthe spinal column of the apparatus showing one of the vertebrae andelectrical switches associated therewith;

FIG. 4 is a fragmentary, side elevational view of two of the vertebraeand associated switches, on the same scale as FIG. 3;

FIG. 5 and 6 are diagrammatic views illustrating right and leftrotation, respectively, of a vertebra;

FIG. 7 is a fragmentary, diagrammatic view showing the manner in whichthe transparent zones are illuminated; and

FIG. 8 is an electrical schematiciliagram of a portion of the lightingsystem.

Referring initially to FIGS. 1 and 2, an upright cabinet 10 is supportedon a horizontal base 12 and includes a center section 14 and a pair ofleft and right wing sections 16 and 18 respectively. A simulated humanspine 20 is supported in front of the center section 14 in an erectposition, and comprises a series of simulated vertebrae of the humananatomy. Accordingly, the reference numeral 22 broadly denotes the sevencervical vertebrae, the numeral 24 designates the twelve thoracic ordorsal vertebrae, and the numeral 26 designates the five lumbarvertebrae. The simulation also includes a representation of a skull 28above the atlas 22a, and the ilia 30 beneath the fifth lumbar vertebra26c.

The wing sections 16 and 18 of the cabinet 10 support a pictorialrepresentation of a portion of the human anatomy, such representationbeing divided into a pair of two'dimensional illustrations 32 and 34 ofthe right and the left sides, respectively, of the anatomy as seen in afrontal view. It should be noted that the two illustrations 32 and 34,therefore, face generally forwardly toward the viewer, but that thespine 20 faces rearwardly with respect to these illustrations.Accordingly, a viewer standing in front of the cabinet 10 sees the backof the spine 20 as if viewing the human anatomy from the rear, but theillustrations 32 and 34 are seen viewing the human anatomy from thefront. For this reason, the illustration 32 of the right side of thebody flanks the spine 20 on the left side thereof, and the illustration34 of the left side of the body flanks the spine 20 on the right sidethereof. It may be noted in FIG. 2 that it is preferred that the wingsections 16 and 18 extend forwardly from the center section 14 at anangle for the convenience of a viewer standing directly in front of thespine 20 during operation of the apparatus.

Referring particularly to FIGS. 3 and 4, the first thoracic vertebra 24ais illustrated in both of these figures, together with the seventhcervical vertebra 22g in FIG. 4. An interior wall 36 of the centercabinet section 14 is located adjacent the front of the cabinet andmounts a central, upright support 38 in the nature of a channel memberwith flanged longitudinal edges. A box member 40 is located in front ofthe support 38 and is curved to simulate the natural curvature of theerect human spine. The member 40 is rigidly attached to the support 38at the upper and lower ends of the member 40, the latter serving as amount for the entire series of vertebrae constituting the simulatedspinal columnf In FIG. 3 it may be noted that the vertebra 24a has thecharacteristic transverse processes 42 beneath which the spinal nerves44 emanate from the intervertebral foramen. The simulation includes aspinal canal 46 (for the spinal cord) from which the nerves 44 branch.The vertebra 24a is carried by a horizontal stem 48 received within abushing 50 in the member 40. As is illustrated by the phantom lines inFIG. 3, the stem 48 (and hence the vertebra 24a) is reciprocable in thebushing 50 between the normal position thereof shown in full lines and alaterally displaced position shown by the phantom lines. An enlargedinner end 52 on the stem 48 prevents complete withdrawal of the stemfrom the bushing 50 and limits its lateral movement.

The term lateral as used herein refers to a vertebral displacement in aplane through the human anatomy seen when viewed laterally or at rightangles to the anterior-posterior direction. This plane is the plane of alateral radiograph of the spine used in conjunction with ananterior-posterior radiograph in determining whether a patient has amisaligned vertebra, either laterally displaced or rotated left orright.

The' vertebra 24a is attached to the stem 48 by a pivot pin 54 so thatleft and right rotation is permitted as well as lateral displacement ofthe vertebra as discussed above. This same arrangement is employed inthe attachment of each vertebra to the member 40.

Electrical switching structure comprising a pair of on-off switches 56and 58 is mounted on the flange portions of the support 38 in horizontalalignment with the vertebra 24a. A pair of brackets 60 mounts two pushrods 62 and 64 which are aligned with the operators of the two switches56 and 58 respectively. These rods 62 and 64 are axially shiftable inthe brackets 60 and have forward ends which are engaged by shouldersformed on the back side (anatomical front) of the vertebra 24a as it isrotated from left to right or laterally displaced, as will be discussedhereinafter. As may be seen in FIG. 4, this same switching arrangementis employed for the seventh cervical vertebra 22g, and it is to beunderstood that similar switching structure and operating linkage isprovided for all of the other vertebrae. Accordingly, a series ofswitches 56 and a series of switches 58 are provided just behind thespine within thecentral cabinet section 14 so that manipulation of anyof the vertebrae to a misaligned position will cause one of thecorresponding switches 56 or 58, or both thereof, to be actuateddepending upon the type of misalignment.

In FIG. 1, transparent zones on the illustrations 32 and 34 such asindicated at 66 in the shoulder region represent terminal nerve endingsof the spinal nerves 44. (The simulated spinal nerves 44 are notillustrated in FIG. 1 in order to clarify the illustration of the spine20.) Other nerve endings include the upper arm 68, the lower arm 70, thefingers 72, the upper lung 74, the lower lung 76 andthe heart 78. In thehead, it may be seen that nerve endings are shown for the forehead,upper and lower sinus, ear and cheek. Additional illustrated nerveendings in the trunk comprise the intercostal nerve, diaphragm, liver,kidney, stomach, pancreas, spleen (left side), ascending colon (rightside), transverse colon, descending colon (left side), upper and lowersmall intestines, appendix 79 (right side), bladder, obturator nerve 80and sciatic nerve 82. As will be discussed hereinafter, nerve impulsesare also traced to the gall bladder on the right side of the body andthe islet of Langerhans on the left side, the transparent zonesrepresenting such endings being omitted from FIG. 1 in the interestofclarity.

Referring to FIGS. 1 and 7, the forwardly facing viewing surface 84 ofeach of the illustrations 32 and 34 is presented by a transparent mat 86upon which the picture of the anatomy is painted on the back side. Thelayer of paint is represented at 88 in FIG. 7, where it may be seen thatthe transparent zone 66 is depicted by a break in the paint layer. Inorder to protect each of the mats 86, it is preferred that a plexiglassplate 90 supported in a suitable frame be employed in each of the wingsections 16 and 18 in front of the mat 86. With reference to FIG. 2, itmay be seen that the wing section 16 is provided with a rear panel 92 inthe nature of a hinged door which may be swung to an open position asillustrated by the broken lines. A portion of this panel 92 is shown inFIG. 7, and is employed as a mounting board for the various electricaldevices of the apparatus. Such devices include a number of electriclamps which are disposed directly behind the trans-. parent zones in themat 86 when the panel 92 is in its normal, closed position. One suchlamp 94 is shown in FIG. 7 7 in alignment with the zone 66. In order torestrict the cone 96 of the light rays emanating from the lamp 94, thelatter may be covered with an opaque material such as aluminum foil toprovide a small, light emitting aperture 98. It may be appreciated thatit is necessary to restrict the area of illumination of each of thelamps 94 so that only one transparent zone will be illuminated by agiven lamp 94.

NERVE TRACING AND OPERATION Before describing the operation of theapparatus of the present invention, it is first instructive to set forththe locations of the terminal nerve endings of the various spinal nervesemanating from the intervertebral foramina. For the right side of thebody, the following nerve endings are affected when the designatedvertebra is rotated to the right out of proper alignment with the othervertebrae. C refers to cervical vertebrae, T" refers to thoracicvertebrae, and L" refers to lumbar vertebrae.

C1 Upper and lower sinuses C2 Forehead, cheek, ear

C3 Diaphragm C4 Shoulder, upper lung, lower lung, heart C5 Shoulder,upper lung, lower lung, heart C6 Shoulder, upper arm, lower arm, fingersC7 Upper lung, lower lung, upper arm, lower arm,

fingers, heart I Tl Upper lung, lower lung, upper arm, lower arm,

fingers, heart T2 Upper lung, lower lung, heart T3 Upper lung, lowerlung, heart T4 Upper lung, lower lung, heart T5 Liver, pancreas,stomach, gall bladder T6 Liver, pancreas, stomach, gall bladder T7Liver, pancreas, stomach, gall bladder T8 Liver, pancreas, stomach, gallbladder T9 Ascending colon, transverse colon, upper intestine, lowerintestine, appendix, intercostal nerve T10 Ascending colon, transversecolon, upper intestine, lower intestine, appendix Tl] Ascending colon,transverse colon, upper intestine, lower intestine, appendix T12Ascending colon, transverse colon,'upper intestine, lower intestine,appendix Ll Kidney, bladder L2 Kidney, bladder, obturator nerve L3Obturator nerve L4 Sciatic nerve L5 Kidney, bladder, sciatic nerve Thenerve tracing to the left side of the body in terms of the affectedorgan, muscle, bone or tissue structure, when nerve interference isproduced by left rotation of vertebrae to a misaligned position, is asfollows:

C1 Upper and lower sinuses C2 Forehead, cheek, ear

C3 Diaphragm C4 Shoulder, upper lung, lower lung, heart C5 Shoulder,upper lung, lower lung, heart C6 Upper arm, lower arm, fingers,shoulder, upper lung, lower lung, heart C7 Upper arm, lower arm,fingers, shoulder, upper lung, lower lung, heart T1 Upper arm, lowerarm, fingers, shoulder, upper lung, lower lung, heart T2 Heart,shoulder, upper lung, lower lung T3 Heart, shoulder, upper lung, lowerlung T4 Heart, shoulder, upper lung, lower lung T5 Spleen, stomach,islet of Langerhans T6 Spleen, stomach, islet of Langerhans T7 Spleen,stomach, islet of Langerhans T8 Spleen, stomach, islet of Langerhans T9Spleen, stomach, islet of Langerhans, intercostal nerve T10 Transversecolon, descending colon, upper intestine, lower intestine Tll Transversecolon, descending colon, upper intestine, lower intestine T12 Transversecolon, descending colon, 'upper intestine, lower intestine Ll Kidney,bladder L2 Kidney, bladder, obturator nerve L3 Obturator nerve L4Sciatic nerve L5 Kidney, bladder, sciatic nerve In FIG. 8 a portion ofthe electrical circuitry between the various switches 56 and 58 and thelamps 94 is illustrated. A pair of power leads 100 are connected to asuitable source of electric current. The switch 56 designated C1 is theswitch that will be closed upon rotation of the first cervical vertebraor atlas to the left, causing energization of the two lamps 94 thatilluminate the nerve endings at the upper and lower sinuses on the leftside of the body. The switches 56 from the atlas down through the firstthoracic vertebra, T1, for left rotation, are illustrated in FIG. 8. Forthe right side of the body, the T1 switch 58 is shown connected to theassociated lamps 94. The other switch and lamp connections for the leftand right sides of the body are not shown in FIG. 8, but such circuitryis evident from the nerve tracing to both sides of the body listedabove.

The various switches 56 and 58 are all normally open and are of singlepole or multiple pole type depending upon the nerve endings to beilluminated. For example, referring to FIG. 8, the C2 switch 56 isoperable to energize the three lamps 94 that illuminate the nerveendings in the forehead, cheek andear on the left side of the body. TheC3 switch 56, when closed, energizes the single lamp 94 that illuminatesthe diaphragm nerve ending on the left side. The C4, C5, C6, C7 and Tlswitches 56 individually control the energization of four lamps 94corresponding to the shoulder, upper lung, lower lung and heart on theleft side. Additionally, a second pole of the C6 switch 56 energizes thethree lamps 94 corresponding to the upper arm, lower arm and fingers onthe left side, as required by the tracing. A second pole on the C7 andT1 switches 56 also executes this same function.

The first thoracic vertebra 240 shown in detail in FIGS. 3 and 4 isselected for a specific illustration of the operation of the apparatus.It is initially assumed that the practitioner has a patient with a firstthoracic vertebra that is out of alignment due to left rotation. Forboth his own information and in explaining the diagnosis to the patient,the practitioner rotates the simulated vertebra 24a to the left asillustrated in FIG. 6. This pushes the rod 62 rearwardly against theoperator of the T1 switch 56, causing closure thereof and energizationof the seven lamps 94 shown in FIG. 8. Viewing the illustration 34 ofthe left side of the body, the transparent zones 66, 74, 76, 78, 68, and72 are now illuminated to clearly indicate the regions of the bodyaffected by the nerve interference. In order to highlight theindication, a delay relay 102 (FIG. 8) is provided in series with one ofthe power leads to cause the energized lamps to flash on and offintermittently. The relay 102 may be of the thermal delay type having aheater 104 and a pair of normally closed contacts 106 which open inresponse to the heat produced by the heater 104. Since the contacts 106and the heater 104 are in series, it is evident that on and off flashingwill be produced since power is interrupted to the heater 104 each timethe contacts 106 break.

Now assuming that the first thoracic vertebra of the patient is rotatedto the right rather than the left, the simulated vertebra 24a is rotatedas shown in FIG. 5 to push the rod 64 against the operator of the T1switch 58. In FIG. 8 it may be seen that six lamps 94 are therebyenergized to illuminate the zones 74, 76, 78, 68, 70 and 72 on theillustration 32 of the right side of the body. Now assuming that thecondition is that of a lateral displaced first thoracic vertebra, thesimulated vertebra 24a is shifted out of lateral alignment asillustrated by the phantom lines in FIG. 3 to operate both of the T1switches 56 and 58. Manifestly, the same lamps will be energized thatwould be energized by both left and right rotation of the vertebra. Theswitches and lighting circuits of the other vertebrae operate in ananalogous fashion in accordance with the nerve tracing set forthhereinabove.

It should be understood that each vertebra of the simulated spine 20remains in a rotated or laterally displaced position until returned toits normal position by the practitioner or instructor. Accordingly, theaffected regions of the body will continue to be indicated on thepictorial illustrations until all displaced vertebrae are returned tonormal alignment. In this connection, the internal springs (now shown)within the housings of the switches 56 and 58 serve to reopen theswitches once pressure is released from the push rods 62 and 64, therebyalso returning such rods to their normal positions illustrated. Ifdesired, individual return springs for the rods 62 and 64 may also beemployed.

Since there will naturally be extensive cabling from the switches 56 andS8 to the wing sections 16 and 18 of the cabinet 10, the appearance ofthe center section 14 is enhanced by the use ofa front panel 108(FIG. 1) which is located just rearwardly of the vertebrae supportingmember 40. Furthermore, the panel 108 prevents the operator fromaccidentally reaching any of the switches 56 or 58 in order to eliminateany possible shock hazard.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is:

1. Instructional display apparatus for tracing a nerve impulse from theemission of the spinal nerve at the intervertebral foramen level to theterminal nerve ending at an organ, a muscle, a bone, or tissue, saidapparatus comprising:

a simulated human spine having a series of vertebrae, each rotatable tothe left or right from a normal position in proper alignment with theother vertebrae;

electrical switching means operable in response to left or rightrotation of each of said vertebrae;

a pictorial representation of human anatomy;

a plurality of electrically responsive devices operably associated withsaid representation for illuminat ing selected nerve endings in saidanatomy; and

circuit means interconnecting said switching means and said devices forenergizing a predetermined device or group of devices in response torotation in one direction of a corresponding vertebra, whereby tovisually indicate on said representation the organ, muscle, bone ortissue structure affected by interference with the nerve emanating fromthe rotated vertebra.

2. Apparatus as claimed in claim 1, wherein said switching meansincludes a plurality of switching structures, each operably associatedwith a corresponding vertebra and responsive to rotation thereof, saidcircuit means interconnecting each of said switching structures and thedevice or group thereof to be energized when the corresponding vertebrais rotated left or right.

3. Apparatus as claimed in claim 2, wherein each of said vertebrae isshiftable away from its normal position to a displaced position out oflateral alignment with the other vertebrae, each of said switchingstructures being responsive to shifting of the corresponding vertebra toits laterally displaced position to effect energization of the samedevices that could be energized by both left and right rotation of thevertebra, whereby to visually indicate the effect of interference withboth nerves emanating from the laterally displaced vertebra.

4. Apparatus as claimed in claim 2, wherein said switching structuresare arranged in a series adjacent said series of vertebrae, and whereinlinkage means is provided for mechanically coupling each vertebra withthe corresponding switching structure.

5. Apparatus as claimed in claim 4, wherein each of said switchingstructures comprises a pair of switches responsive to left and rightrotation, respectively, of the corresponding vertebra.

6. Apparatus as claimed in claim 5, wherein each of said vertebrae isshiftable away from its normal position to a displaced position out oflateral alignment with the other vertebrae, said linkage means effectingoperation of both switches of a switching structure in response toshifting of the corresponding vertebra to its laterally displacedposition to energize both the device or group thereof that would beenergized by left rotation of the vertebra and the device or groupthereof that would be energized by right rotation of the vertebra.

7. Apparatus as claimed in claim 1, wherein said representation isprovided with a forwardly facing viewing surface upon which said anatomyis pictured, said surface having transparent zones at said selectednerve endings, each of said devices comprising an electric lamp disposedbehind said representation adjacent a corresponding zone forilluminating the latter.

8. Apparatus as claimed in claim 1, wherein a central, upright supportis provided mounting said spine in an erect position, saidrepresentation comprising a pair of two-dimensional illustrations ofportions of the left and right sides of the body respectively, saidillustrations being disposed in flanking relationship to said spine onopposite sides thereof.

9. Apparatus as claimed in claim 8, wherein each of said illustrationsis provided with a forwardly facing viewing surface upon which therespective side of the body is pictured in a frontal view, and whereinsaid spine is supported in generally rearwardly facing relationship withrespect to said illustrations, with the illustration of the left side ofthe body flanking the spine on the right side thereof and theillustration of the right side of the body flanking the spine on theleft side thereof.

10. Apparatus as claimed in claim 9, wherein said viewing surfaces havetransparent zones at said selected nerve endings, each of said devicescomprising an electric lamp disposed behind a particular illustrationadjacent a corresponding zone for illuminating the latter.

1. Instructional display apparatus for tracing a nerve impulse from theemission of the spinal nerve at the intervertebral foramen level to theterminal nerve ending at an organ, a muscle, a bone, or tissue, saidapparatus comprising: a simulated human spine having a series ofvertebrae, each rotatable to the left or right from a normal position inproper alignment with the other vertebrae; electrical switching meansoperable in response to left or right rotation of each of saidvertebrae; a pictorial representation of human anatomy; a plurality ofelectrically responsive devices operably associated with saidrepresentation for illuminating selected nerve endings in said anatomy;and circuit means interconnecting said switching means and said devicesfor energizing a predetermined device or group of devices in response torotation in one direction of a corresponding vertebra, whereby tovisually indicate on said representation the organ, muscle, bone ortissue structure affected by interference with the nerve emanating fromthe rotated vertebra.
 2. Apparatus as claimed in claim 1, wherein saidswitching means includes a plurality of switching structures, eachoperably associated with a corresponding vertebra and responsive torotation thereof, said circuit means interconnecting each of saidswitching structures and the device or group thereof to be energizedwhen the corresponding vertebra is rotated left or right.
 3. Apparatusas claimed in claim 2, wherein each of said vertebrae is shiftable awayfrom its normal position to a displaced position out of lateralalignment with the other vertebrae, each of said switching structuresbeing responsive to shifting of the corresponding vertebra to itslaterally displaced position to effect energization of the same devicesthat could be energized by both left and right rotation of the vertebra,whereby to visually indicate the effect of interference with both nervesemanating from the laterally displaced vertebra.
 4. Apparatus as claimedin claim 2, wherein said switching structures are arranged in a seriesadjacent said series of vertebrae, and wherein linkage means is providedfor mechanically coupling each vertebra with the corresponding switchingstructure.
 5. Apparatus as claimed in claim 4, wherein each of saidswitching structures comprises a pair of switches responsive to left andright rotation, respEctively, of the corresponding vertebra. 6.Apparatus as claimed in claim 5, wherein each of said vertebrae isshiftable away from its normal position to a displaced position out oflateral alignment with the other vertebrae, said linkage means effectingoperation of both switches of a switching structure in response toshifting of the corresponding vertebra to its laterally displacedposition to energize both the device or group thereof that would beenergized by left rotation of the vertebra and the device or groupthereof that would be energized by right rotation of the vertebra. 7.Apparatus as claimed in claim 1, wherein said representation is providedwith a forwardly facing viewing surface upon which said anatomy ispictured, said surface having transparent zones at said selected nerveendings, each of said devices comprising an electric lamp disposedbehind said representation adjacent a corresponding zone forilluminating the latter.
 8. Apparatus as claimed in claim 1, wherein acentral, upright support is provided mounting said spine in an erectposition, said representation comprising a pair of two-dimensionalillustrations of portions of the left and right sides of the bodyrespectively, said illustrations being disposed in flanking relationshipto said spine on opposite sides thereof.
 9. Apparatus as claimed inclaim 8, wherein each of said illustrations is provided with a forwardlyfacing viewing surface upon which the respective side of the body ispictured in a frontal view, and wherein said spine is supported ingenerally rearwardly facing relationship with respect to saidillustrations, with the illustration of the left side of the bodyflanking the spine on the right side thereof and the illustration of theright side of the body flanking the spine on the left side thereof. 10.Apparatus as claimed in claim 9, wherein said viewing surfaces havetransparent zones at said selected nerve endings, each of said devicescomprising an electric lamp disposed behind a particular illustrationadjacent a corresponding zone for illuminating the latter.